133. I decided ___________ at this hotel for the next five days.

A. stay            B. staying       C. to stay        D. stayed

134. Children should be _______to realize their full potential.

A. courageous                       B. encouraged            C. encouraging        D. discouraged

135. Before the invention of vaccines, people _________ from many fatal diseases without treatment.

A. suffered                B. has suffered                 C. had suffered                               D. suffer

136. Andy: “Thank you very much for your help.”

        Maya: “_______”

A. Thank you very much too.                    B. How nice of you to say so!

C. Yes. That's alright.                                  D. You're welcome.

137. Since the computer ___________ , it has made considerable changes to our daily life.

A. has been invented           B. was invented        C. was being invented         D. is invented

138. What should we do to reduce the level of environmental_______?

A. polluted                     B. pollute             C. pollution           D. polluting

139. Nowadays it is not easy _______a well-paid job.

A. find            B. finding       C. found         D. to find

140. Max: “Could you do me a favour, please?”

Mike: “_______”

A. Do you really need help?      B. Sure. No problem.

C. No, thank you.                       D. Yes. and when's that?